SCSI timeouts under A/UX
Jan Purchase
J.Purchase at cs.ucl.ac.uk
Mon Jan 14 08:30:53 AEST 1991
Hello,
I run A/UX 2.0 from an external Quantum 120Mb hard disk and I am
encountering SCSI timeouts (about 6 per day) from this drive. Can anyone out
there give me a clue as to *why* this is happening?
My / and /usr partitions are on the external, which has SCSI id 4; the
internal houses the /users partition. Every now and then the Mac (a 5Mb
IIcx) freezes for 10 seconds during which the external drive's access light
is on for 5 seconds and then off for the next 5. Finally an error message:
Disk write c4d0s0 Error: SCSI timeout
Logical block 808, physical blocks 78038-78045
Disk write c4d0s0 retry #2 successful
appears at the console and processing continues as normal. The drive number
varies (often it is c4d0s2, i.e. /usr; or c4d0s1, i.e. swap), as do the
logical and physical block numbers. However, the retry count is always 2 and
the problem is always a write error. The error does not perturb A/UX (apart
from the delay), but under the Finder some Mac applications quit immediately
on receipt of the error.
The same drive has been used under MacOS for some 4 months previously with
no ill effects or errors. A thorough going over with SCSI Evaluator reveals
no fault - has anyone else encountered this problem? Any ideas?
Grateful for any help,
Jan.
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FROM : Jan Andrew Purchase | Snail: Room 208, PhD Lab.,
| Computer Science Dept.,
JANET : J.Purchase at uk.ac.ucl.cs | University College,
ARPANET : J.Purchase at cs.ucl.ac.uk | London, UK.
UUCP : {... ukc!}ucl.cs!purchase |
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(these are my views, and are not necessarily those of UCL)
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